Iraq was originally on the list as well, but was removed in the revised version of the travel ban.

Trump argues the travel ban is about national security, but critics contend it's really about Islamophobia.

In a statement, Trump described Monday's decision in the Supreme Court as a "clear victory for our national security."

The president added,

I cannot allow people into our country who want to do us harm. I want people who can love the United States and all of its citizens, and who will be hardworking and productive. My number one responsibility as Commander in Chief is to keep the American people safe.

But many questions remain as to whether or not the travel ban actually keeps Americans safe.

Not to mention, 15 of the 19 hijackers on 9/11 were from Saudi Arabia, but it's not included on the list. The other hijackers were from Egypt, Lebanon, and the United Arab Emirates, which are also not on the list.

While that is tragic and should not be overlooked, that statistic pales it comparison to number killed by gun violence in the U.S. every single year.

In 2016 alone, for example, over 15,000 people were killed by gun violence in the U.S. But you don't see the Trump administration rushing to review gun laws.

It's also worth noting a majority of terrorists in the U.S. are right-wing extremists, not Muslim, according to a recent joint report from the Investigative Fund at the Nation Institute, a nonprofit media centre, and news outlet Reveal from the Center for Investigative Reporting.

Moreover, after Trump's initial travel ban, it was reported jihadist groups were celebrating on social media. They argued the travel ban reinforced their case the West is at war with Islam, a notion that's central to their recruiting efforts.

In short, there are a number of valid constitutional, ethical, and practical concerns surrounding Trump's travel ban.

Those who oppose it are arguably not only on the right side of history, but also on the side of facts and logic.